?url_ver=Z39.88-2004&rft_id=10.1007%2F978-981-16-0742-4%E2%82%82%E2%82%81&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Redzuan&rft.au=Redzuan%2C+S.&rft.aufirst=S.&rft.issn=21954356&rft.isbn=9789811607417&rft.atitle=Optimization+of+Anthocyanins+Extracts+from+Roselle+(Hibiscus+sabdarifa)+Petals+Using+Ultrasonic-Assisted+Extraction+Method&rft.pages=295-309&rft.title=Lecture+Notes+in+Mechanical+Engineering&rft.date=2021&rft.genre=article